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Chemistry: 05 - Chemical Bonding: Chemical Formulas > Writing Formulas Of Compounds Containing Transition Metals > Flashcards

Writing Formulas Of Compounds Containing Transition Metals Flashcards

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1
Q

Define the valency of an element.

A

The valency of an element is defined as the number of atoms of hydrogen or ay other monovalent element with which each atom of the element combines

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2
Q

Give the four transition metals that show variable valency.

A

Iron

Copper

Chromium

Manganese

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3
Q

What can be formed when iron combines with chlorine?

2

A

FeCl2 Iron (II) chloride

FeCl3 Iron (III) chloride

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4
Q

What is FeCl2?

A

Iron (II) chloride

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5
Q

What is FeCl3?

A

Iron (III) chloride

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6
Q

What can be formed when copper combines with oxygen?

2

A

Cu2O Copper (I) oxide

CuO Copper (II) oxide

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7
Q

What is Cu2O?

A

Copper (I) oxide

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8
Q

What is CuO?

A

Copper (II) oxide

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9
Q

What is the formula for copper (I) oxide?

A

Cu2O

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10
Q

What is the formula for copper (II) oxide?

A

CuO

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11
Q

How does chromium combine with chlorine?

A

Chromium exists as Cr^3+ ions in chromium (III) chloride, CrCl3

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12
Q

What is the formula for chromium (III) chloride?

A

CrCl3

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13
Q

What is CrCl3?

A

Chromium (III) chloride

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14
Q

How does chromium combine with sodium?

A

Chromium exists as Cr^6+ in sodium dichromate/sodium dichromate (VI) Na2Cr2O7

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15
Q

What is Na2Cr2O7?

A

Sodium dichromate/sodium dichromate (VI)

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16
Q

What is the formula for sodium dichromate/sodium dichromate (VI)?

A

Na2Cr2O7

17
Q

What is MnO2?

A

Manganese (IV) oxide or manganese dioxide

18
Q

What is the formula for manganese (IV) oxide or manganese dioxide?

A

MnO2

19
Q

What is MnSO4?

A

Manganese (II) sulfate

20
Q

What is the formula for manganese (II) sulfate?

A

MnSO4

21
Q

What are the two names for KMnO4?

A

Potassium permanganate or potassium manganate (VII)

22
Q

What is the formula for potassium permanganate or potassium manganate (VII)?

A

KMnO4

23
Q

Why do transition metals exhibit variable valency?

2

A

Because there is such a small energy difference between the 4s and 3d sublevels

This means that they can lose different numbers of electrons from these sublevels to give metal ions with different positive charges

24
Q

Describe a compound ending in -ide.

A

Contains just two elements

25
Q

Describe a compound ending in -ate.

A

Contain oxygen as well as two other elements

26
Q

What is the ending to all ionic compounds containing just two elements?

A

ide

27
Q

What is the ending to all ionic compounds containing oxygen as well as two other elements?

A

ate

Chemistry: 05 - Chemical Bonding: Chemical Formulas (24 decks)

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